path: root/drivers/char/Kconfig

#
# Character device configuration
#

menu "Character devices"

config VT
	bool "Virtual terminal" if EMBEDDED
	depends on !S390
	select INPUT
	default y
	---help---
	  If you say Y here, you will get support for terminal devices with
	  display and keyboard devices. These are called "virtual" because you
	  can run several virtual terminals (also called virtual consoles) on
	  one physical terminal. This is rather useful, for example one
	  virtual terminal can collect system messages and warnings, another
	  one can be used for a text-mode user session, and a third could run
	  an X session, all in parallel. Switching between virtual terminals
	  is done with certain key combinations, usually Alt-<function key>.

	  The setterm command ("man setterm") can be used to change the
	  properties (such as colors or beeping) of a virtual terminal. The
	  man page console_codes(4) ("man console_codes") contains the special
	  character sequences that can be used to change those properties
	  directly. The fonts used on virtual terminals can be changed with
	  the setfont ("man setfont") command and the key bindings are defined
	  with the loadkeys ("man loadkeys") command.

	  You need at least one virtual terminal device in order to make use
	  of your keyboard and monitor. Therefore, only people configuring an
	  embedded system would want to say N here in order to save some
	  memory; the only way to log into such a system is then via a serial
	  or network connection.

	  If unsure, say Y, or else you won't be able to do much with your new
	  shiny Linux system :-)

config CONSOLE_TRANSLATIONS
	depends on VT
	default y
	bool "Enable character translations in console" if EMBEDDED
	---help---
	  This enables support for font mapping and Unicode translation
	  on virtual consoles.

config VT_CONSOLE
	bool "Support for console on virtual terminal" if EMBEDDED
	depends on VT
	default y
	---help---
	  The system console is the device which receives all kernel messages
	  and warnings and which allows logins in single user mode. If you
	  answer Y here, a virtual terminal (the device used to interact with
	  a physical terminal) can be used as system console. This is the most
	  common mode of operations, so you should say Y here unless you want
	  the kernel messages be output only to a serial port (in which case
	  you should say Y to "Console on serial port", below).

	  If you do say Y here, by default the currently visible virtual
	  terminal (/dev/tty0) will be used as system console. You can change
	  that with a kernel command line option such as "console=tty3" which
	  would use the third virtual terminal as system console. (Try "man
	  bootparam" or see the documentation of your boot loader (lilo or
	  loadlin) about how to pass options to the kernel at boot time.)

	  If unsure, say Y.

config HW_CONSOLE
	bool
	depends on VT && !S390 && !UML
	default y

config VT_HW_CONSOLE_BINDING
       bool "Support for binding and unbinding console drivers"
       depends on HW_CONSOLE
       default n
       ---help---
         The virtual terminal is the device that interacts with the physical
         terminal through console drivers. On these systems, at least one
         console driver is loaded. In other configurations, additional console
         drivers may be enabled, such as the framebuffer console. If more than
         1 console driver is enabled, setting this to 'y' will allow you to
         select the console driver that will serve as the backend for the
         virtual terminals.

	 See <file:Documentation/console/console.txt> for more
	 information. For framebuffer console users, please refer to
	 <file:Documentation/fb/fbcon.txt>.

config DEVKMEM
	bool "/dev/kmem virtual device support"
	default y
	help
	  Say Y here if you want to support the /dev/kmem device. The
	  /dev/kmem device is rarely used, but can be used for certain
	  kind of kernel debugging operations.
	  When in doubt, say "N".

config BFIN_JTAG_COMM
	tristate "Blackfin JTAG Communication"
	depends on BLACKFIN
	help
	  Add support for emulating a TTY device over the Blackfin JTAG.

	  To compile this driver as a module, choose M here: the
	  module will be called bfin_jtag_comm.

config BFIN_JTAG_COMM_CONSOLE
	bool "Console on Blackfin JTAG"
	depends on BFIN_JTAG_COMM=y

config SERIAL_NONSTANDARD
	bool "Non-standard serial port support"
	depends on HAS_IOMEM
	---help---
	  Say Y here if you have any non-standard serial boards -- boards
	  which aren't supported using the standard "dumb" serial driver.
	  This includes intelligent serial boards such as Cyclades,
	  Digiboards, etc. These are usually used for systems that need many
	  serial ports because they serve many terminals or dial-in
	  connections.

	  Note that the answer to this question won't directly affect the
	  kernel: saying N will just cause the configurator to skip all
	  the questions about non-standard serial boards.

	  Most people can say N here.

config COMPUTONE
	tristate "Computone IntelliPort Plus serial support"
	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
	---help---
	  This driver supports the entire family of Intelliport II/Plus
	  controllers with the exception of the MicroChannel controllers and
	  products previous to the Intelliport II. These are multiport cards,
	  which give you many serial ports. You would need something like this
	  to connect more than two modems to your Linux box, for instance in
	  order to become a dial-in server. If you have a card like that, say
	  Y here and read <file:Documentation/serial/computone.txt>.

	  To compile this driver as module, choose M here: the
	  module will be called ip2.

config ROCKETPORT
	tristate "Comtrol RocketPort support"
	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
	help
	  This driver supports Comtrol RocketPort and RocketModem PCI boards.   
          These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
          modems.  For information about the RocketPort/RocketModem  boards
          and this driver read <file:Documentation/serial/rocket.txt>.

	  To compile this driver as a module, choose M here: the
	  module will be called rocket.

	  If you want to compile this driver into the kernel, say Y here.  If
          you don't have a Comtrol RocketPort/RocketModem card installed, say N.

config CYCLADES
	tristate "Cyclades async mux support"
	depends on SERIAL_NONSTANDARD && (PCI || ISA)
	select FW_LOADER
	---help---
	  This driver supports Cyclades Z and Y multiserial boards.
	  You would need something like this to connect more than two modems to
	  your Linux box, for instance in order to become a dial-in server.

	  For information about the Cyclades-Z card, read
	  <file:Documentation/serial/README.cycladesZ>.

	  To compile this driver as a module, choose M here: the
	  module will be called cyclades.

	  If you haven't heard about it, it's safe to say N.

config CYZ_INTR
	bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
	depends on EXPERIMENTAL && CYCLADES
	help
	  The Cyclades-Z family of multiport cards allows 2 (two) driver op
	  modes: polling and interrupt. In polling mode, the driver will check
	  the status of the Cyclades-Z ports every certain amount of time
	  (which is called polling cycle and is configurable). In interrupt
	  mode, it will use an interrupt line (IRQ) in order to check the
	  status of the Cyclades-Z ports. The default op mode is polling. If
	  unsure, say N.

config DIGIEPCA
	tristate "Digiboard Intelligent Async Support"
	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
	---help---
	  This is a driver for Digi International's Xx, Xeve, and Xem series
	  of cards which provide multiple serial ports. You would need
	  something like this to connect more than two modems to your Linux
	  box, for instance in order to become a dial-in server. This driver
	  supports the original PC (ISA) boards as well as PCI, and EISA. If
	  you have a card like this, say Y here and read the file
	  <file:Documentation/serial/digiepca.txt>.

	  To compile this driver as a module, choose M here: the
	  module will be called epca.

config MOXA_INTELLIO
	tristate "Moxa Intellio support"
	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
	select FW_LOADER
	help
	  Say Y here if you have a Moxa Intellio multiport serial card.

	  To compile this driver as